BIOL10005 Lecture Notes - Lecture 13: Coral Bleaching, Monogenea, Trematoda
31 Oct 2018
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Coral provides algae with nutrients & protection. Algae provides coral with nitrogen and carbon compounds. Turbellaria (aquatic, free living), monogenea (external, parasitic), trematoda (internal, parasitic), cestoda (parasitic) Bottom surface covered with cilia -> independent movement. Allows transport of fluids -> development of circulatory and excretory systems. Blastula: early developmental stage when cells begin to differentiate. Opening called blastopore forms when cells begin to invaginate. If the blastopore becomes the mouth -> protostome. Closed vascular system transport of vital gases, food and excretory system. Presence of nerve cord in each segment. Antagonistic circular & longitudinal muscle aids movement -> parapodia (false legs) help movement as well. Free swimming & sendentary (cid:858)parapodia(cid:859) o(cid:374) every seg(cid:373)e(cid:374)t. Mantle cavity: space between mantle and the main body where gills (lungs for terrestrial) are found. Muscular foot: used for moving, feeding and manipulation. Herbivorous and predatory radula have different structures (sand paper vs sharp, sword-like radula) Lost radula; filter feed (through foot & gills)
